feat: add apotheosis third prestige layer and remove IDEAS.md

Apotheosis is the ultimate reset — wipes absolutely everything
including prestige and transcendence — in exchange for a pure
bragging-rights badge. No mechanical benefit whatsoever.

Unlock condition: all 15 Transcendence echo upgrades purchased.
Can be achieved multiple times; each cycle requires repurchasing
all Transcendence upgrades again.

What survives: Codex lore entries and lifetime profile statistics.
What is wiped: resources, prestige, runestones, transcendence data
(echoes, echo upgrades, multipliers), equipment, upgrades, bosses,
quests, zones, adventurers, achievements.

New files: Apotheosis.ts type, apotheosis service, apotheosis route,
ApotheosisPanel.tsx component.

Modified: GameState (apotheosis field), Api.ts, types/index.ts,
prestige service (carry apotheosis), transcendence service (carry
apotheosis), game.ts anti-cheat (cap apotheosis count), API client,
GameContext (apotheosis() function), GameLayout (new tab), ResourceBar
(gold apotheosis badge shown above transcendence and prestige badges),
styles.css, AboutPanel how-to-play.

Also removes IDEAS.md — all planned features are now implemented!

apps/web/src/components/game/AboutPanel.tsx

@@ -63,6 +63,10 @@ const HOW_TO_PLAY = [
     title: "🌌 Transcendence",
     body: "Transcendence is the ultimate prestige layer, unlocked by defeating The Absolute One (requires Prestige 90). Transcending performs a nuclear reset — wiping resources, prestige, runestones, upgrades, and equipment — but grants Echoes based on your prestige count (fewer prestiges = more Echoes). Echoes are permanent and survive all future resets. Spend them in the Echo Shop on lasting multipliers: passive income, combat power, prestige quality-of-life, and Echo meta upgrades that amplify future Echo yields.",
   },
+  {
+    title: "✨ Apotheosis",
+    body: "Apotheosis is the final act — a complete dissolution of everything you have built, including your prestige and transcendence progress. It is unlocked once you have purchased every Transcendence upgrade. In exchange for this total reset, you receive the Apotheosis badge: pure bragging rights, a mark of reaching the absolute pinnacle of the game. Apotheosis can be achieved multiple times; each cycle requires purchasing all Transcendence upgrades again. Your Codex entries and lifetime profile statistics are always preserved.",
+  },
 ];
 
 const formatDate = (dateStr: string): string =>